"Kerry's motivation in putting a deal together is just that: getting the deal," Keane said. "He's not on top of the issue and making certain that this deal is in the best interest of the United States. ... That's why he has brokered two lousy deals that are completely adverse to the American people."

On the other hand, he praised President Trump for taking the "courageous" action of pulling the U.S. from the Paris agreement.

Keane said Trump is doing the right thing for American citizens, explaining that the deal hurt the U.S. economically, while not putting harsher restrictions on major polluters like India and China.

He noted that the U.S. was the leader in emissions control years before the Paris agreement, and we're not going to give that up.

"President Trump is providing more motivation and inspiration for additional innovation and technology than any president I've seen in my adult life," Keane said. "So I think we're going to continue to be the world's leader in it."